Methods and systems for a vehicle driveline power take off

• US 8,813,881 B2
• Filed: 10/15/2012
• Issued: 08/26/2014
• Est. Priority Date: 05/04/2012
• Status: Active Grant

• Current Assignee: Ford Global Technologies, LLC (Ford Motor Company)
• Original Assignee: Ford Global Technologies, LLC (Ford Motor Company)
• Inventors: Gibson, Alex O'Connor, Pietron, Gregory Michael, Fujii, Yuji, Doering, Jeffrey Allen, McCallum, James William Loch
• Primary Examiner(s): Fleming, Faye M.
• Application Number:
  US13/652,349
• Publication Number:
  US 20130292195A1
• Time in Patent Office: 680 Days
• Field of Search: 180/53.1, 180/65.1, 180/65.21, 180/65.31, 180/53.5, 180/53.8, 180/65.27
• US Class Current: 180/53.1
• CPC Class Codes: B60K 17/28 characterised by arrangement, location, or type of power take-off
• CPC Class Codes: B60K 2006/4825 Electric machine connected or connectable to gearbox input shaft
• CPC Class Codes: B60K 6/48 Parallel type
• CPC Class Codes: B60K 6/52 Driving a plurality of drive axles, e.g. four-wheel drive
• CPC Class Codes: B60W 10/02 including control of driveline clutches
• CPC Class Codes: B60W 10/023 Fluid clutches
• CPC Class Codes: B60W 10/026 of lock-up clutches
• CPC Class Codes: B60W 10/06 including control of combustion engines
• CPC Class Codes: B60W 10/08 including control of electric propulsion units, e.g. motors or generators
• CPC Class Codes: B60W 10/26 for electrical energy, e.g. batteries or capacitors
• CPC Class Codes: B60W 10/30 including control of auxiliary equipment, e.g. air-conditioning compressors or oil pumps
• CPC Class Codes: B60W 20/10 Controlling the power contribution of each of the prime movers to meet required power demand
• CPC Class Codes: B60W 20/13 in order to stay within battery power input or output limits; in order to prevent overcharging or battery depletion
• CPC Class Codes: B60W 20/40 Controlling the engagement or disengagement of prime movers, e.g. for transition between prime movers power-up or power-down of the driveline B60W30/192
• CPC Class Codes: B60W 2510/1005 Transmission ratio engaged
• CPC Class Codes: B60W 2520/403 between front and rear axle
• CPC Class Codes: B60W 2540/12 Brake pedal position
• CPC Class Codes: B60W 2540/16 Ratio selector position
• CPC Class Codes: B60W 2710/021 Clutch engagement state
• CPC Class Codes: B60W 2710/024 of torque converter lock-up clutch
• CPC Class Codes: B60W 2710/027 : Clutch torque
• CPC Class Codes: B60W 2710/065 : Idle condition
• CPC Class Codes: B60W 2710/083 : Torque
• CPC Class Codes: B60W 30/02 : Control of vehicle driving stability
• CPC Class Codes: B60W 30/18 : Propelling the vehicle
• CPC Class Codes: B60W 30/18018 : Start-stop drive, e.g. in a traffic jam
• CPC Class Codes: B60W 30/18045 : Rocking, i.e. fast change between forward and reverse
• CPC Class Codes: B60W 30/18063 : Creeping
• CPC Class Codes: B60Y 2200/92 : Hybrid vehicles
• CPC Class Codes: B60Y 2300/188 : Controlling power parameters of the driveline, e.g. determining the required power
• CPC Class Codes: B60Y 2300/42 : Control of clutches
• CPC Class Codes: B60Y 2300/421 : Control of lock-up type clutches, e.g. in a torque converter
• CPC Class Codes: B60Y 2300/43 : Control of engines
• CPC Class Codes: B60Y 2300/60 : Control of electric machines, e.g. problems related to electric motors or generators
• CPC Class Codes: F01P 3/00 : Liquid cooling
• CPC Class Codes: F02D 41/065 : at hot start or restart F02D41/067 takes precedence
• CPC Class Codes: F02N 11/003 : said electric motor being also used as a drive for auxiliaries, e.g. for driving transmission pumps or fuel pumps during engine stop
• CPC Class Codes: F02N 11/04 : the motors being associated with current generators
• CPC Class Codes: F02N 11/0833 : Vehicle conditions F02N11/0822, F02N11/0825 take precedence
• CPC Class Codes: F02N 11/084 : State of vehicle accessories, e.g. air condition or power steering
• CPC Class Codes: F02N 2200/124 : Information about road conditions, e.g. road inclination or surface
• CPC Class Codes: Y02T 10/40 : Engine management systems
• CPC Class Codes: Y02T 10/62 : Hybrid vehicles
• CPC Class Codes: Y10S 477/90 : Control signal is vehicle weight
• CPC Class Codes: Y10S 903/916 : with plurality of drive axles
• CPC Class Codes: Y10S 903/93 : Conjoint control of different elements

Abstract

Systems and methods for improving operation of a power take off are presented. In one example, the power take off may be rotated in two different directions. The approaches may improve operation of a power take off device.

Claims

1. A method of operating a power take off (PTO) of a vehicle, comprising:

rotating a device external the vehicle and different than vehicle wheels via rotating a PTO output by way of rotating a PTO power source in a first direction; and

reversing rotation of the PTO output via rotating the PTO power source in a second direction different than the first direction, the PTO power source positioned in a vehicle driveline.

2. The method of claim 1, where the PTO power source is positioned between an engine and a torque converter.

3. The method of claim 2, where the PTO power source is a driveline integrated starter generator (DISG).

4. The method of claim 2, where the PTO power source is also positioned between a driveline disconnect clutch and the torque converter.

5. The method of claim 3, further comprising ceasing output of the DISG in response to a PTO operated device being at a travel limit.

6. The method of claim 4, where the driveline disconnect clutch is in an open state while rotating the PTO output.

7. The method of claim 1, where a vehicle including the vehicle driveline is operated in a stationary PTO mode where the vehicle does not move.

8. The method of claim 1, further comprising providing an indication of an impending PTO shutdown in response to a battery state of charge (SOC).

9. The method of claim 8, further comprising ceasing to provide power to the PTO output via the PTO power source after providing the indication of the impending PTO shutdown.

10. A method of operating a power take off (PTO) of a vehicle, comprising:

rotating a mechanical device external the vehicle and other than vehicle wheels via a PTO output by way of rotating a first PTO power source and a second PTO power source, the first PTO power source and the second PTO power source providing positive torque to a vehicle driveline; and

varying output of the first PTO power source and the second PTO power source in response to available output of the second PTO power source.

11. The method of claim 10, where the first PTO power source is an engine, and where the second PTO power source is a driveline integrated starter/generator (DISG).

12. The method of claim 10, where a driveline disconnect clutch positioned in a driveline between the first PTO power source and the second PTO power source is in a closed state.

13. The method of claim 10, further comprising adjusting output of the first PTO power source in response to a wheel torque that is less than a desired wheel torque.

14. The method of claim 10, further comprising adjusting output of the second PTO power source in response to a wheel torque that is less than a desired wheel torque.

15. A method of operating a power take off (PTO), comprising:

operating the PTO in a stationary parked vehicle, the PTO operated in a stationary mode;

rotating a PTO output via rotating a first PTO power source in a first direction and a second direction in the stationary mode; and

rotating the PTO output via a positive torque provided by the first PTO power source and a positive torque provided by a second PTO power source in the stationary mode.

16. The method of claim 15, further comprising opening a driveline disconnect clutch when rotating the PTO in the second direction and opening or closing the driveline disconnect clutch when rotating the PTO in the first direction.

17. The method of claim 15, further comprising ceasing to operate the first PTO power source in response to a battery state of charge (SOC).

18. The method of claim 15, further comprising adjusting a speed of the PTO output via adjusting the positive torque provided by the first PTO power source.

19. The method of claim 15, further comprising adjusting a speed of the PTO output via adjusting the positive torque provided by the second PTO power source.

20. The method of claim 17, where the first PTO power source is a driveline integrated starter/generator (DISG), and where the second PTO power source is an engine, and where the DISG is positioned in a driveline between a transmission and the engine.